SDP-DP/SDP-DQ Stainless Steel Multi-Stage Pump
The third generation SDP-DP/SDP-DQ lightweight vertical multi-stage centrifugal pump is a product based on the design concept of energy saving, environmental protection, safety and reliability, and adopts new industrial and hydraulic design methods.
- Description
- Working Conditions
- Model Description
- Water Pump Steering
- Installation and Connection
- Water Pump Installation
Description
SDP-DP / SDP-DQ Lightweight Vertical Multistage Centrifugal Pump
The third-generation SDP-DP / SDP-DQ lightweight vertical multistage centrifugal pump is developed based on advanced design concepts of energy efficiency, environmental protection, safety, and high reliability. The pump integrates modern industrial design with optimized hydraulic technology to deliver stable performance across a wide range of operating conditions.
This pump series is designed to accommodate various temperatures, flow rates, and pressure requirements, enabling reliable transportation of media ranging from clean tap water to industrial process liquids.
Application Areas
The SDP-DP / SDP-DQ pump series is widely used in:
Water supply and pressurization systems
Industrial boosting and liquid transfer
HVAC circulation systems
Agricultural irrigation
Water treatment and purification systems
In addition, the SDP-DQ model is suitable for applications in beverage, pharmaceutical, and light chemical industries, where mild corrosion resistance is required.
Media Compatibility
SDP-DP: Suitable for non-corrosive liquids, such as clean water and similar fluids
SDP-DQ: Suitable for mildly corrosive liquids, offering enhanced material resistance
Standards Compliance
This product complies with GB/T 5657 – Technical Conditions for Centrifugal Pumps (Class III), ensuring reliable quality, standardized performance, and suitability for industrial applications.
Working Conditions
Speed: 2900 r/min (50Hz)
Liquid: clean water or liquid with physical and chemical properties similar to water
Liquid temperature: -20-70°C; 70-120°C (high temperature configuration)
Ambient temperature: maximum +40°C,
Altitude: height less than 1000m
Maximum working pressure: suction pressure + pump maximum pressure < 2.5Mpa
Maximum suction height: When using it, users should consider the impact of various factors on use. The maximum suction height H should be lower than the calculated value below (negative values indicate backflow). Otherwise, the pump will not work properly.
H=Pbx10.2-NPSH-Hf-Hv-Hs
Pb = local atmospheric pressure bar (sea level 1bar)
NPSH=NPSH m
Hf=Inlet pipe loss m
Hv=liquid saturated vapor pressure m
Hs=safety margin m (minimum 0.5m)
Example: Assuming atmospheric pressure Pb=1bar, pump NPSH=2m, suction pipeline loss Hf=2.2m,
(1) When the liquid temperature is 20°C, the saturated vapor pressure Hv=0.23m
H=1×10.2-2-2.2-0.23-0.5= 5.27m
(2) When the liquid temperature is 85°C, the saturated vapor pressure Hv=5. 89m
H=1×10.2-2-2-5.89-0.5= -0.39m pump needs to be poured back
The temperature of the liquid delivered by the pump is inconsistent, and the suction height is also different when the other operating conditions of the pump are the same.
Model Description
Water Pump Steering
Installation and Connection
Note: SDP-DP25, 32, and 40 are equipped with round flanges as standard, and cast iron oval flanges (threaded interface) are optional.
SDP-DQ25 and 32 are equipped with round flange as standard, and bayonet type and external pipe threaded connection are optional.
SDP-DQ40 comes standard with a round flange and optional bayonet connection.
SDP-DP/Q50, 65, 80, 100, and 150 are equipped with round flanges as standard, among which SDP-DQ50 is optional with bayonet connection.
Special instructions: 1. The oval flange connection has a pressure resistance level of 1.6Mpa and below. If it is greater than 1.6Mpa, please use a round flange connection;
All standard flanges comply with GB/T17241.6-2008 design standards, with a pressure rating of 2.5 MPa;
Matching flanges and pipe clamps for pipeline connection must be ordered separately.
Water Pump Installation
- When installing the pump, attention should be paid to the height difference between the suction liquid level and the pump water inlet to ensure that when the pump is working, the sum of the pressure loss in the suction pipeline, the liquid saturated vapor pressure and the height difference does not exceed the capacity of the pump. Allow vacuum height to be drawn up.
- In order to prevent debris in the pipeline from entering the pump, a filter should be installed in the water inlet pipeline, and its flow cross-section should be greater than twice the cross-section of the pipe.
3. The water pump must be installed on the foundation. Place the pump on the foundation and use a level to check the level of the base.
4. When installing the water inlet and outlet pipes, their connection directions should be consistent with the marks on the base. And care should be taken not to concentrate the weight and stress of the pipeline on the pump.
5. Check whether the power supply voltage and frequency are consistent with the motor nameplate, and check whether the flow rate and head of the water pump are consistent with the production requirements.
When wiring the motor, the power supply must be disconnected.
The motor needs to be connected to an external terminal with a switch.
6. The pump is installed vertically. To ensure that the motor is fully cooled, the motor cannot be turned upside down.
7. Before installing the pump, the pipeline system should be cleaned, and no particulate matter should be left in the pipeline. At the same time, a filter should be installed 0.5-1m in front of the pump suction inlet to ensure the normal operation of the water pump.
When installing on suction, a check valve must be installed at the suction port.
